/Engine/Source/Runtime/GeometryCore/Public/Spatial/SegmentTree3.h
Find the nearest segment to query point P, and return it in NearestSegmentOut
bool FindNearestSegment ( const FVector3d & P, [FSegment](API\Runtime\GeometryCore\Spatial\FSegmentTree3\FSegment) & NearestSegmentOut, const [IMeshSpatial::FQueryOptions](API\Runtime\GeometryCore\Spatial\IMeshSpatial\FQueryOptions) & Options ) const